One vertex per element, one color per generator, with an edge from x to x·s.
(7,11)(10,12)(13,14,16,18)(15,19,20,17)(21,22)(23,29)(24,26)(25,32)(27,31)(28,33)(30,34)(35,36)(1,2,3,4)(5,6,9,8)(7,10,11,12)(13,14,16,18)(15,17,20,19)(22,24)(27,29)(28,32)(34,35)(1,2)(3,4)(13,14)(15,17)(16,18)(19,20)(21,23)(22,27)(24,29)(25,30)(26,31)(28,34)(32,35)(33,36) involution — undirected(5,7)(6,10)(8,12)(9,11)(13,14)(15,17)(16,18)(19,20)(21,24,26,22)(23,29,31,27)(25,28,33,32)(30,34,36,35)(5,8,9,6)(7,12,11,10)(13,15)(14,17)(16,20)(18,19)(21,25,26,33)(22,28,24,32)(23,30,31,36)(27,34,29,35)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.